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Processing Materials
Processing Materials for Packaging
| Term | Definition |
|---|---|
| four categories of materials | paper & paperboard metals glass plastics |
| applications for wood in packaging | barrels crates nailed or wire bound boxes pallets & skids |
| what makes up wood? | 50% cellulose 30% lignin 20% carbohydrate |
| what gives paper its structure ? | cellulose |
| what is lignin ? | brown, sticky substance |
| what is the thickness of paper? | .012" or less |
| what is the thickness of paperboard ? | greater than .012" |
| what is thickness referred to as ? | points |
| 1 point = | .001" |
| what happens when paper gets wet ? | it looses its strength |
| mechanical | doesn't use chemicals---uses all wood low brightness & strength usually combined with other pulps |
| chemical | sulfate (kraft) sulfite soda higher quality & stronger |
| what is the most widely used chemical? | sulfate (kraft) |
| semichemical | cook wood in chemicals grind in dise refiner not used much--- except for media |
| what is the cheapest way to make pulp? | mechanical |
| what is the speed of paper making? | 300 ft/min |
| what is the web width? | 3o ft |
| what is the production? | 800 miles/day |
| what are the two types of paper making machines ? | fourdrinier cylinder (cross section of cylinder board) |
| which is for paperboard only? | cylinder |
| which can be used for paper or paperboard? | fourdrinier |
| what is the general procedure for paper making? | screen squeeze dry |
| calendering | like ironing paper run through stack of rollers increases density & smoothness important for strength & print quality |
| what is the basis weight for paper? | lbs/3000 sq ft |
| what is the basis weight for paperboard? | lbs/1000 sq ft |
| what is thickness for paper measured in ? | inches |
| what is thickness for paperboard measured in? | points |
| Advantages for paper/paperboard | renewable recyclable inexpensive easily printed on |
| Disadvantages | loses strength when wet porous to moisture & oxygen combustible |
| types of paperboard | clay coated news back solid bleached sulfate |
| what appearance does solid bleached sulfate give? | cleanliness |
| what are some basic design styles | tube tray hybrid |
| solid fiberboard | several piles of paperboard laminated together |
| uses of solid fiberboard | shippung containers dividers corner supports |
| basic construction of corrugated paperboard | medium & linerboard |
| three important features: | height of flutes distance between flute peaks type of liner board |
| uses of A,B,C flutes & double & triple walls | shipping boxes point of purchase display |
| uses of E & F flutes | retail boxes for small appliances or bulky items fast food packaging |
| RSC | regular slotted container |
| 3 ways to make pulp | mechanical chemical semichemical |
| what is thickness referred to as? | points |
| four categories of materials | paper & paperboard metals glass plastics |
| four categories of materials | paper & paperboard metals glass plastics |
Created by:
rudolph.beukes
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